Multi-function portable lantern



FIG. 1 is a front perspective view of a multi-function portable lantern showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for multi-function portable lantern, substantially as shown. 